﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Reflection;

namespace CrazyTalk.Common
{
    public class DataHelper
    {

    }

    /// <summary>     
    /// 实体转换辅助类     
    /// </summary>     
    public class ModelConvertHelper<T> where T : new()
    {
        public static IList<T> ConvertToModel(DataTable dt)
        {
            // 定义集合             
            IList<T> ts = new List<T>();
            // 获得此模型的类型            
            Type type = typeof(T);
            string tempName = "";
            foreach (DataRow dr in dt.Rows)
            {
                T t = new T();
                // 获得此模型的公共属性                
                PropertyInfo[] propertys = t.GetType().GetProperties();
                foreach (PropertyInfo pi in propertys)
                {
                    tempName = pi.Name;
                    // 检查DataTable是否包含此列                   
                    if (dt.Columns.Contains(tempName))
                    {
                        // 判断此属性是否有Setter          
                        if (!pi.CanWrite) continue;
                        object value = dr[tempName];
                        if (value != DBNull.Value)
                            pi.SetValue(t, value, null);
                    }
                }
                ts.Add(t);
            }
            return ts;
        }
    }
}

////示例：
//// 获得查询结果 
//DataTable dt = DbHelper.ExecuteDataTable(...); 
//// 把DataTable转换为IList<UserInfo>
//IList<UserInfo> users = ModelConvertHelper<UserInfo>.ConvertToModel(dt);